diff --git a/build.mill b/build.mill
index 978884877..39b004400 100644
--- a/build.mill
+++ b/build.mill
@@ -16,7 +16,7 @@ import de.tobiasroeser.mill.vcs.version.VcsVersion
 import com.github.lolgab.mill.mima._
 
 val scala212  = "2.12.18"
-val scala213  = "2.13.11"
+val scala213  = "2.13.15"
 
 val scala3   = "3.3.4"
 val scalaNative = "0.5.5"